Libpq coding assistance
От | Scott Holmes |
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Тема | Libpq coding assistance |
Дата | |
Msg-id | 1004903734.17832.12.camel@scotts обсуждение исходный текст |
Ответы |
Is there an internal timestamp on a table when it was created?
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Список | pgsql-general |
I am in need of some assistance in coding a c module using libpq on a windows platform. Specifically, I need some help with providing the input buffer for lo_write. The code sample provided in the documentation contains this snippet: ------------ lobj_fd = lo_open(conn, lobjId, INV_WRITE); while ((nbytes = read(fd, buffer,BUFSIZE)) > 0) { tmp = lo_write(conn, lobj_fd, buffer, nbytes); if (tmp < nbytes) fprintf(stderr, "error while reading large object\n"); } (void) CloseHandle(fd); (void) lo_close(conn, lobj_fd); ------------ I need to change the read() statement to use ReadFile, thus: ------------ lobj_fd = lo_open(conn, lobjId, INV_WRITE); while (ReadFile(fd, buffer, BUFSIZE, &nbytes, NULL)!=EOF ) { tmp = lo_write(conn, lobj_fd, buffer, nbytes); if (tmp < nbytes) fprintf(stderr, "error while reading large object\n"); } (void) lo_close(conn, lobj_fd); (void) CloseHandle(fd); -------------- This, of course, doesn't work. The program is reported as no longer responding. An infinite loop I suspect. If anyone is doing this or knows how to code it, I would be grateful. -- --------------------------------------------------------------------- Scott Holmes http://pages.sbcglobal.net/scottholmes scottholmes@sbcglobal.net Independent Programmer/Analyst Passport 4GL PHP HTML Composer PostgreSQL Informix 4GL, SQL --------------------------------------------------------------------- There are more things in heaven and earth, Horatio, than are dreamt of in your philosophy ---------------------------------------------------------------------
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